login
Smallest number that is the sum of three positive n-th powers in three ways.
9

%I #5 Apr 04 2021 00:08:16

%S 54,5104,811538

%N Smallest number that is the sum of three positive n-th powers in three ways.

%H R. Alter, <a href="https://doi.org/10.1007/BFb0096461">Computations and generalizations on a remark of Ramanujan</a>, pp. 182-196 of "Analytic Number Theory (Philadelphia, 1980)", ed. M. I. Knopp, Lect. Notes Math., Vol. 899, 1981.

%e a(2) = 54 = 1+4+49 = 4+25+25 = 9+9+36.

%Y Cf. A230563, A342894-A342903.

%K nonn,bref,more

%O 2,1

%A _N. J. A. Sloane_, Apr 03 2021